/*  Copyright 2003  Auri Marcelo Rizzo Vicenzi, Marcio Eduardo Delamaro, 			    Jose Carlos Maldonado

    This file is part of Jabuti.

    Jabuti is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as 
    published by the Free Software Foundation, either version 3 of the      
    License, or (at your option) any later version.

    Jabuti is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with Jabuti.  If not, see <http://www.gnu.org/licenses/>.
*/


/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 2.1 */
package br.jabuti.instrumenter;


public class TokenMgrError extends Error {

    /*
     * Ordinals for various reasons why an Error of this type can be thrown.
     */

    /**
	 * Added to jdk1.5.0_04 compiler
	 */
	private static final long serialVersionUID = 3725236131926128037L;

	/**
     * Lexical error occured.
     */
    static final int LEXICAL_ERROR = 0;

    /**
     * An attempt wass made to create a second instance of a static token manager.
     */
    static final int STATIC_LEXER_ERROR = 1;

    /**
     * Tried to change to an invalid lexical state.
     */
    static final int INVALID_LEXICAL_STATE = 2;

    /**
     * Detected (and bailed out of) an infinite loop in the token manager.
     */
    static final int LOOP_DETECTED = 3;

    /**
     * Indicates the reason why the exception is thrown. It will have
     * one of the above 4 values.
     */
    int errorCode;

    /**
     * Replaces unprintable characters by their espaced (or unicode escaped)
     * equivalents in the given string
     */
    protected static final String addEscapes(String str) {
        StringBuffer retval = new StringBuffer();
        char ch;

        for (int i = 0; i < str.length(); i++) {
            switch (str.charAt(i)) {
            case 0:
                continue;

            case '\b':
                retval.append("\\b");
                continue;

            case '\t':
                retval.append("\\t");
                continue;

            case '\n':
                retval.append("\\n");
                continue;

            case '\f':
                retval.append("\\f");
                continue;

            case '\r':
                retval.append("\\r");
                continue;

            case '\"':
                retval.append("\\\"");
                continue;

            case '\'':
                retval.append("\\\'");
                continue;

            case '\\':
                retval.append("\\\\");
                continue;

            default:
                if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
                    String s = "0000" + Integer.toString(ch, 16);

                    retval.append("\\u" + s.substring(s.length() - 4, s.length()));
                } else {
                    try {
						retval.append(ch);
					} catch (Exception e) {
						e.printStackTrace();
					}
                }
                continue;
            }
        }
        return retval.toString();
    }

    /**
     * Returns a detailed message for the Error when it is thrown by the
     * token manager to indicate a lexical error.
     * Parameters : 
     *    EOFSeen     : indicates if EOF caused the lexicl error
     *    curLexState : lexical state in which this error occured
     *    errorLine   : line number when the error occured
     *    errorColumn : column number when the error occured
     *    errorAfter  : prefix that was seen before this error occured
     *    curchar     : the offending character
     * Note: You can customize the lexical error message by modifying this method.
     */
    private static final String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
        return ("Lexical error at line " + errorLine + ", column " + errorColumn
                + ".  Encountered: "
                + (EOFSeen
                ? "<EOF> "
                : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " ("
                + (int) curChar + "), ") + "after : \"" + addEscapes(errorAfter)
                + "\"");
    }

    /**
     * You can also modify the body of this method to customize your error messages.
     * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
     * of end-users concern, so you can return something like : 
     *
     *     "Internal Error : Please file a bug report .... "
     *
     * from this method for such cases in the release version of your parser.
     */
    public String getMessage() {
        return super.getMessage();
    }

    /*
     * Constructors of various flavors follow.
     */

    public TokenMgrError() {}

    public TokenMgrError(String message, int reason) {
        super(message);
        errorCode = reason;
    }

    public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
        this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
    }
}
